Protective film structure and electronic device comprising same

Abstract

A protective film of a display device includes: a hard coating layer; a transparent adhesive layer; a base layer between the hard coating layer and the transparent adhesive layer; and a primer layer between the transparent adhesive layer and the base layer, where the transparent adhesive layer comprises at least one of polysilazane or silazane.

What is claimed is: 
     
         1 . A protective film structure comprising:
 a hard coating layer;   a transparent adhesive layer;   a base layer between the hard coating layer and the transparent adhesive layer; and   a primer layer between the transparent adhesive layer and the base layer,   wherein the transparent adhesive layer comprises at least one of polysilazane or silazane.   
     
     
         2 . The protective film structure of  claim 1 , wherein the transparent adhesive layer has at least one of a thickness of 50 nm to 30 μm, an adhesion strength of at least 750 N/m, or a light transmittance of at least 80%. 
     
     
         3 . The protective film structure of  claim 1 , wherein the transparent adhesive layer further comprises siloxane, and
 wherein the transparent adhesive layer comprises the polysilazane having a molecular weight of 1,500 g/mol or more.   
     
     
         4 . The protective film structure of  claim 1 , wherein at least a portion of the transparent adhesive layer comprises a lattice pattern,
 wherein the lattice pattern has a line thickness of 100 nm to 10 μm, and   wherein the lattice pattern comprises at least one of a straight pattern, a diagonal pattern, and a geometric mesh pattern.   
     
     
         5 . The protective film structure of  claim 1 , wherein the primer layer has a thickness of 0.1 μm to 5 μm, and
 wherein each of the primer layer and the hard coating layer comprises a first coating material. 
 
     
     
         6 . The protective film structure of  claim 1 , wherein the hard coating layer has at least one of a thickness of 5 μm to 70 μm, a pencil hardness of at least 7 H, or a flexural strength of at least 2.0 R. 
     
     
         7 . The protective film structure of  claim 1 , wherein the hard coating layer comprises a functional layer on a surface of the hard coating layer, inside the hard coating layer, or both on a surface of and inside the hard coating layer, and
 wherein the functional layer comprises an anti-fouling layer.   
     
     
         8 . A protective film structure comprising:
 a hard coating layer;   a transparent adhesive layer; and   a base layer between the hard coating layer and the transparent adhesive layer,   wherein the transparent adhesive layer comprises nanoparticles and an adhesive.   
     
     
         9 . The protective film structure of  claim 8 , wherein the transparent adhesive layer has at least one of a thickness of 50 nm to 10 μm, an adhesion strength of at least 750 N/m, or a light transmittance of at least 80%. 
     
     
         10 . The protective film structure of  claim 8 , wherein at least a portion of the transparent adhesive layer comprises a lattice pattern,
 wherein the lattice pattern has a line thickness of  10  μm to  100  μm, and   wherein the lattice pattern comprises at least one of a straight pattern, a diagonal pattern, and a geometric mesh pattern.   
     
     
         11 . The protective film structure of  claim 8 , wherein the nanoparticles comprise at least one of silicon (Si), titanium (Ti), tantalum (Ta), zirconium (Zr), boron (B), aluminum (Al), magnesium (Mg), zinc (Zn), tin (Sn), cerium (Ce), vanadium (V), chromium (Cr), antimony (Sb), and oxides thereof. 
     
     
         12 . The protective film structure of  claim 8 , wherein the nanoparticles have a particle size of 300 nm or less, and
 wherein the adhesive comprises the nanoparticles in an amount of 1 part by weight to 10 parts by weight per 100 parts by weight of the adhesive.   
     
     
         13 . The protective film structure of  claim 8 , wherein the hard coating layer has at least one of a thickness of 5 μm to 70 μm, a pencil hardness of at least 7 H, or a flexural strength of at least 2.0 R. 
     
     
         14 . The protective film structure of  claim 8 , wherein the hard coating layer comprises a functional layer on a surface of the hard coating layer, inside the hard coating layer, or both on a surface of and inside the hard coating layer, and
 wherein the functional layer comprises an anti-fouling layer.   
     
     
         15 . An electronic device comprising:
 a flexible display; and   a protective film structure provided on the flexible display,   wherein the protective film structure comprises:
 a hard coating layer, 
 a transparent adhesive layer; 
 a base layer between the hard coating layer and the transparent adhesive layer; and 
 a primer layer between the transparent adhesive layer and the base layer, and wherein the transparent adhesive layer comprises at least one of polysilazane or silazane.